Product Overview
The BUCHER HYDRAULICS CINDY 25-B-CND-S500-A-G21-1 is a precision-engineered load control valve (also referred to as a counterbalance or over-center valve) designed to provide safe, controlled lowering of suspended loads and reliable load holding in hydraulic circuits. Manufactured by Bucher Hydraulics, a globally recognized leader in mobile and industrial hydraulic components, this valve belongs to the CINDY series of compact load control cartridges. The CINDY 25-B-CND-S500-A-G21-1 operates on a pilot-assisted, pressure-balanced spool principle, allowing it to meter flow precisely during lowering while preventing uncontrolled load descent in the event of hose or line failure. With a rated flow capacity of approximately 25 L/min and a pressure setting designated by the S500 code (nominally 500 bar), this valve is purpose-built for high-pressure industrial and mobile hydraulic systems where safety, stability, and precise motion control are paramount.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Valve — Pressure Control / Load Control Valve |
| Model Designation | CINDY 25-B-CND-S500-A-G21-1 |
| Series | BUCHER CINDY Load Control Valve Series |
| Nominal Flow Rate | 25 L/min (size 25 designation) |
| Pressure Setting | S500 — nominal setting up to 500 bar |
| Operating Pressure | High-pressure industrial grade (up to rated 500 bar) |
| Actuation Type | Pilot-assisted, pressure-balanced spool |
| Mounting & Connection | Cartridge-type, standard Bucher cavity interface |
| Seal Configuration | G21 — standard industrial seal kit |
Engineering Features & Advantages
- Precision Load Holding & Metering: The pressure-balanced spool design ensures smooth, stable lowering of heavy loads with precise flow control, eliminating jerky motion and cavitation in the actuator circuit.
- Fail-Safe Load Locking: In the event of a sudden pressure loss or hose burst, the valve automatically closes to prevent the load from dropping, providing critical safety in lifting and holding applications.
- High-Pressure Capability: Rated for pressures up to 500 bar, making it suitable for demanding high-pressure hydraulic systems in mobile and industrial machinery.
- Compact Cartridge Design: Space-saving cartridge construction allows direct integration into manifold blocks and custom hydraulic integrated circuits (HICs), reducing system footprint and piping complexity.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original BUCHER standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
With a rated flow capacity of approximately 25 L/min and a pressure setting designated by the S500 code (nominally 500 bar), this valve is purpose-built for high-pressure industrial and mobile hydraulic systems where safety, stability, and precise motion control are paramount.
PRODUCT IMAGES

BUCHER HYDRAULICS CINDY 25-B-CND-S500-A-G21-1 Load Control Valve
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